Preparation method of solvent-free photochromic energy storage luminescent polyurethane for synthetic leather

A photochromic, energy-storage and luminescence technology, which is applied in the field of preparation of solvent-free photochromic energy-storage and luminescence polyurethane for synthetic leather, can solve problems such as limited application, fabrics that cannot meet market demand, monotony and rigidity, and achieve Solve the effect of poor compatibility

Active Publication Date: 2017-11-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the most widely used long-lasting luminescent materials are mainly green aluminates or blue silicates. The luminescent colors are concentrated in a narrow wavelength range, which is relatively single, and it seems too monotonous and dull, which cannot be given to people especially. Young people who like to pursue fashion elements bring more beauty and fun. Single-color fabrics cannot meet the needs of the market, and it also constrains fashion designers to choose individual clothing fabrics, limiting its wider application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Preparation of hydroxyl-terminated polyurethane prepolymer: 30 parts of polypropylene glycol (PPG2000) with a number average molecular weight of 2000 and 8 parts of polytetrahydrofuran diol (PTMG1000) with a number average molecular weight of 1000 were prepared at 120°C, -0.08 Carry out dehydration for 5 hours under the vacuum condition of MPa~-0.1MPa to reduce the occurrence of side reactions, and reserve; add the dehydrated PTMG2000 and PTMG1000 into the reactor, and then put in the chain extender in turn 1,4 - 1.35 parts of butanediol and 15 parts of isophorone diisocyanate, 0.1 part of dibutyltin laurate as a catalyst, heat up to 75°C, stir for 3 hours and cool down to 55°C, add end-capping agent N - 4.5 parts of methyl monoethanolamine, stirred for 0.5h, sealed and packaged for later use;

[0027] (2) Preparation of solvent-free photochromic energy storage luminescent polyurethane for synthetic leather: the 4,4' -Dicyclohexylmethane diisocyanate (H 12 MDI) 30...

Embodiment 2

[0030] (1) Preparation of hydroxyl-terminated polyurethane prepolymer: 40 parts of polypropylene glycol (PPG4000) with a number average molecular weight of 4000 and polyadipate with a number average molecular weight of 1000- 1,4 - 10 parts of butanediol ester diol (PBA1000) were dehydrated for 4 hours at 120°C under the vacuum condition of -0.08MPa~-0.1MPa to reduce the occurrence of side reactions, for later use; add the dehydrated PPG4000 and PBA1000 to the reaction In the kettle, put 1 part of chain extender diethylene glycol, 10 parts of isophorone diisocyanate, 2 parts of hexamethylene diisocyanate, and 0.07 part of catalyst stannous octoate in sequence, raise the temperature to 85 °C, stir for 2 hours, and then cool down to 55℃, add capping agent N - 3.5 parts of methyl monoethanolamine, stirred for 0.5h, sealed and packaged for later use;

[0031] (2) Preparation of solvent-free photochromic energy storage luminescent polyurethane for synthetic leather: 7.8 parts of he...

Embodiment 3

[0034] (1) Preparation of hydroxyl-terminated polyurethane prepolymer: 40 parts of polyethylene glycol (PEG2000) with a number average molecular weight of 2000 and 20 parts of polyethylene glycol with a number average molecular weight of 1000 (PEG1000) were prepared at 120 ° C, - Dehydrate for 4.5 hours under vacuum conditions of 0.08MPa~-0.1MPa, in order to reduce the occurrence of side reactions, and set aside; add the dehydrated PEG2000 and PEG1000 into the reactor, and then put in 3 parts of chain extender triethylene glycol and two 18 parts of phenylmethane diisocyanate, 0.05 part of catalyst dimethylcyclohexylamine, heat up to 65°C, stir for 2.5h, cool down to 55°C, add end-capping agent N - 5 parts of methyl monoethanolamine, stirred for 0.5h, sealed and packaged for later use;

[0035] (2) Preparation of solvent-free photochromic energy storage luminescent polyurethane for synthetic leather: the 4,4' - 21 parts of dicyclohexylmethane diisocyanate, long afterglow lumin...

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PUM

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Abstract

The invention discloses a preparation method of solvent-free photochromic energy storage luminescent polyurethane for synthetic leather. A long-afterglow luminescent material and a light conversion agent are introduced into polyurethane at the same time, and endow polyurethane with good variable color luminescent characteristics. The polyurethane can absorb ultraviolet and visible light simultaneously, is red in daytime and emits yellow light at night, overcomes the problem that the color of existing luminescent materials is concentrated within a narrow wavelength range and is relatively single, and can endow synthetic leather products with new varieties and patterns. The selected light conversion agent itself contains hydroxyl and imino, can be embedded into a polyurethane structural unit by a chemical bond, solves the problems of poor compatibility with polyurethane, easy migration and precipitation and the like in existing blended compound light conversion agents, and can have more stable and durable color change effect. In addition, the polyurethane does not contain any organic solvent, has outstanding green, environmental protection, health and other characteristics, and can be used for manufacturing of high performance, high quality, high environmental protection synthetic leather, leather and other coating materials.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis, and in particular relates to a preparation method of a solvent-free photochromic energy-storing light-emitting polyurethane for synthetic leather. Background technique [0002] In the polyurethane industry, the artificial leather produced with PU resin and base cloth is called PU synthetic leather, or synthetic leather for short. PU synthetic leather has the advantages of rich colors and various patterns, and the price is cheaper than leather fabrics, so it is very popular among consumers. Automotive interiors and other aspects play an irreplaceable role. [0003] As the global polyurethane synthetic leather industry and consumers have higher and higher environmental requirements for the VOC content of synthetic leather products, synthetic leather based on traditional solvent-based resins can no longer meet the requirements of domestic and foreign markets. Therefore, environme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/12C08G18/32C08G18/40C08G18/42C08G18/48C08G18/66C08G18/73C08G18/75C08G18/76C08K3/24C08K5/18C08L75/08
Inventor 范浩军田赛琦陈意颜俊章培昆
Owner SICHUAN UNIV
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